I have been thinking, just as you have to when we're looking for fresh lead, we've been down a deal, and we've been up a deal, 'bout as much one as t'other.

I should say we're just a little lower down than when we started from that big water-hole, but not much." "Made my back ache a bit, Dummy," said Mark, with a groan, as he leaned himself against a column which was pleasantly smoothed and curved.
"Yes, we've come a good way," replied Dummy, "and you didn't have no sleep last night." The boy munched his last crust, and then lay flat down on his breast, with his mouth over the pool, lowered his lips, and took a long deep drink, after the fashion of a horse.

After this, he rolled himself clear away, and lay upon his back, staring at the two candles stuck in the crack a few feet above his head.
"Does rest your back and lynes, Master Mark, to lie like this for a bit.
You just try it." There was no reply.
"D'you hear, Master Mark?
You try it." Still no response, and he turned his head, to see that his companion's chin was resting upon his chest.
"Sleep!" said Dummy, with a little laugh.

"Can't stand being up all night like I can.

Being on night-shifts, sometimes, I s'pose.